H.C. Starck - Product Information Sliding rings

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Sustainable actions are closely linked to sustainable business. That’s because a company’s long-term success is dependent on it being able to create a business environment that takes the environmental, economic and social impact of its actions into account.

H.C. Starck: an employer of choice

What do a smartphone, a CT scan and a high-performance tunnel drill all have in common? They all contain high-tech materials from H.C. Starck. We produce high-tech materials with unique chemical and physical properties ideally suited to our customers' specifications.

Application:
Sliding rings for liquid-lubricated mechanical seals and gas seals in pumps, stirrers, mills, compressors, turbines and desulfurization plants. Primary shaft seals in naval construction and shaft seals in the gas- and oil extraction.

Sliding Ring

Materials:
SSiC, SiSiC, Al₂O₃ and Si₃N₄

Advantages:

high chemical corrosion resistance
high temperature resistance
high thermal conductivity i.e. rapid dissipation of process heat
low density, i.e. small mass moment of inertia
high wear resistance due to high strength and hardness
good tribological properties

Sintered silicon carbide is the most common material for liquid-lubricated mechanical seals due to its excellent chemical resistance and thermal conductivity. For high-speed gas seals the preferred material is silicon nitride with highest strength and wear resistance.